Propeller-post construction.



V. SCARPERI.

PROPELLER POST CONSTRUCTION.

APPLICATION FILED JULY 26. I918.

Patented Nov. 26, 1918.

PATENT OFFICE.

VINCENT SCARPERI, OF PORTLAND, OREGON.

PROPELLER-POST CONSTRUCTION.

Application filed July 26, 1918.

To all whom it may concern:

Be it known that I, VINCENT SCARPERI, a citizen of the United States, and a resident of Portland, county of Multnomah, State of Oregon, have invented a certain new and useful Improvement in Propeller-Post Constructions, of which the following is a specification.

My invention relates to the construction of steel ships driven by a propeller. As well known, the frame of these ships includes a propeller post which has a bossed portion or bearing through which the engine shaft extends, and to which bossed portion the shell plates must be riveted. Since it is impractical to form the shell plates about the convex surfaces of said bearing, it is the practice at present to connect the shell plating to said surfaces by means of boss plates, which are wrought by hand, so as to put them in the shape required for facilitating said connection. Such is a very slow way of doing this work, and my invention has for its object the simplifying of such work.

I attain my object by casting the sides of said bossed portion or hearing of the propeller post with flanges projecting a substantial distance both longitudinally and perpendicularly, thereby translating the convex surfaces of said sides into substantially straight surfaces at the edge of said flanges, and eliminating the necessity for shaping the shell plates so as to adapt the same for attachment to said stern post. In this way the work of riveting the shell plates to the stern post is greatly facilitated, and, besides, by doing away with said boss plates a firmer structure is obtained at the stern of the vessel.

The construction and arrangement of the parts effected by my invention are illustrated in the accompanying drawings, in which:

Figure 1 shows an elevation of the stern portion of a ships frame, and illustrates the manner of attaching the shell plates to my improved propeller post;

Fig. 2 is a fragmental perspective of the bossed port-ion or shaft bearing of the propeller post, and more clearly shows my improvement as applied to said bearing, a section of the shaft extending through the latter being shown in broken outline;

Specification of Letters Patent.

Patented Nov. 26, 1918.

Serial No. 247,331.

Fig. 3 is a plan section approximately taklen along the center of the shaft bearing; anc

Fig. at is a larger detail of said bearing portion of the propeller post, looking in the direction pointed 'by the arrow 00 in Fig. 1.

a represents the rudder-post, b the propeller-post of the frame of a steel ship, the parts being connected by scarphs, as at c, d. c is the bossed portion bearing of the propeller post, through which the shaft 7" extends, as shown in Fig. 2. Said bearing portion, instead of being made as usual, is cast with flanges g, g which project to such extent both longitudinally and perpendicularly as to translate the convex surfaces of the sides of said bearing into substantially straight surfaces; and, therefore no boss plates are required, for the shell plates h require no appreciable shaping in order that they may be riveted directly on the propeller post. The shell plates it have portions cut away, as shown at i, so that they may be attached to marginal portions of the flanges g, 9 which have substantially straight surfaces. Incidentally, as evident from an inspection of Fig. 1, the shell plates, by being fastened directly to the propeller post-boss and doing away with boss plates for making said connection, the resulting structure is firmer and better as a whole.

I claim:

1. In vessel construction, a propeller post having its shaft bearing portion made with flanges at the sides projecting a substantial distance both longitudinally and perpendicularly, thereby translating the convex surfaces of said sides into substantially straight surfaces at the edges of said flanges.

2. In vessel construction, the combination of a propeller post having its shaft bearing portion made with flanges at the sides projecting a substantial distance both longitudinally and perpendicularly, thereby translating the convex surfaces of said sides into substantially straight surfaces at the edges of said flanges, and shell plates fastened directly on the edges of said flanges, said shell plates having those portions cut away which would overlie said convexed sides of said bearing.

VINCENT SCARPERI.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). C. 

